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//# sourceMappingURL=jquery.flot.js.map

/* eslint-disable */
/* Flot plugin for automatically redrawing plots as the placeholder resizes.

Copyright (c) 2007-2014 IOLA and Ole Laursen.
Licensed under the MIT license.

It works by listening for changes on the placeholder div (through the jQuery
resize event plugin) - if the size changes, it will redraw the plot.

There are no options. If you need to disable the plugin for some plots, you
can just fix the size of their placeholders.

*/

/* Inline dependency:
 * jQuery resize event - v1.1 - 3/14/2010
 * http://benalman.com/projects/jquery-resize-plugin/
 *
 * Copyright (c) 2010 "Cowboy" Ben Alman
 * Dual licensed under the MIT and GPL licenses.
 * http://benalman.com/about/license/
 */
(function($,e,t){"$:nomunge";var i=[],n=$.resize=$.extend($.resize,{}),a,r=false,s="setTimeout",u="resize",m=u+"-special-event",o="pendingDelay",l="activeDelay",f="throttleWindow";n[o]=200;n[l]=20;n[f]=true;$.event.special[u]={setup:function(){if(!n[f]&&this[s]){return false}var e=$(this);i.push(this);e.data(m,{w:e.width(),h:e.height()});if(i.length===1){a=t;h()}},teardown:function(){if(!n[f]&&this[s]){return false}var e=$(this);for(var t=i.length-1;t>=0;t--){if(i[t]==this){i.splice(t,1);break}}e.removeData(m);if(!i.length){if(r){cancelAnimationFrame(a)}else{clearTimeout(a)}a=null}},add:function(e){if(!n[f]&&this[s]){return false}var i;function a(e,n,a){var r=$(this),s=r.data(m)||{};s.w=n!==t?n:r.width();s.h=a!==t?a:r.height();i.apply(this,arguments)}if($.isFunction(e)){i=e;return a}else{i=e.handler;e.handler=a}}};function h(t){if(r===true){r=t||1}for(var s=i.length-1;s>=0;s--){var l=$(i[s]);if(l[0]==e||l.is(":visible")){var f=l.width(),c=l.height(),d=l.data(m);if(d&&(f!==d.w||c!==d.h)){l.trigger(u,[d.w=f,d.h=c]);r=t||true}}else{d=l.data(m);d.w=0;d.h=0}}if(a!==null){if(r&&(t==null||t-r<1e3)){a=e.requestAnimationFrame(h)}else{a=setTimeout(h,n[o]);r=false}}}if(!e.requestAnimationFrame){e.requestAnimationFrame=function(){return e.webkitRequestAnimationFrame||e.mozRequestAnimationFrame||e.oRequestAnimationFrame||e.msRequestAnimationFrame||function(t,i){return e.setTimeout(function(){t((new Date).getTime())},n[l])}}()}if(!e.cancelAnimationFrame){e.cancelAnimationFrame=function(){return e.webkitCancelRequestAnimationFrame||e.mozCancelRequestAnimationFrame||e.oCancelRequestAnimationFrame||e.msCancelRequestAnimationFrame||clearTimeout}()}})(jQuery,window);

/* eslint-enable */
(function ($) {
    var options = { }; // no options

    function init(plot) {
        function onResize() {
            var placeholder = plot.getPlaceholder();

            // somebody might have hidden us and we can't plot
            // when we don't have the dimensions
            if (placeholder.width() === 0 || placeholder.height() === 0) return;

            plot.resize();
            plot.setupGrid();
            plot.draw();
        }

        function bindEvents(plot, eventHolder) {
            plot.getPlaceholder().resize(onResize);
        }

        function shutdown(plot, eventHolder) {
            plot.getPlaceholder().unbind("resize", onResize);
        }

        plot.hooks.bindEvents.push(bindEvents);
        plot.hooks.shutdown.push(shutdown);
    }

    $.plot.plugins.push({
        init: init,
        options: options,
        name: 'resize',
        version: '1.0'
    });
})(jQuery);

/* Flot plugin for plotting textual data or categories.

Copyright (c) 2007-2014 IOLA and Ole Laursen.
Licensed under the MIT license.

Consider a dataset like [["February", 34], ["March", 20], ...]. This plugin
allows you to plot such a dataset directly.

To enable it, you must specify mode: "categories" on the axis with the textual
labels, e.g.

    $.plot("#placeholder", data, { xaxis: { mode: "categories" } });

By default, the labels are ordered as they are met in the data series. If you
need a different ordering, you can specify "categories" on the axis options
and list the categories there:

    xaxis: {
        mode: "categories",
        categories: ["February", "March", "April"]
    }

If you need to customize the distances between the categories, you can specify
"categories" as an object mapping labels to values

    xaxis: {
        mode: "categories",
        categories: { "February": 1, "March": 3, "April": 4 }
    }

If you don't specify all categories, the remaining categories will be numbered
from the max value plus 1 (with a spacing of 1 between each).

Internally, the plugin works by transforming the input data through an auto-
generated mapping where the first category becomes 0, the second 1, etc.
Hence, a point like ["February", 34] becomes [0, 34] internally in Flot (this
is visible in hover and click events that return numbers rather than the
category labels). The plugin also overrides the tick generator to spit out the
categories as ticks instead of the values.

If you need to map a value back to its label, the mapping is always accessible
as "categories" on the axis object, e.g. plot.getAxes().xaxis.categories.

*/

(function ($) {
    var options = {
        xaxis: {
            categories: null
        },
        yaxis: {
            categories: null
        }
    };

    function processRawData(plot, series, data, datapoints) {
        // if categories are enabled, we need to disable
        // auto-transformation to numbers so the strings are intact
        // for later processing

        var xCategories = series.xaxis.options.mode === "categories",
            yCategories = series.yaxis.options.mode === "categories";

        if (!(xCategories || yCategories)) {
            return;
        }

        var format = datapoints.format;

        if (!format) {
            // FIXME: auto-detection should really not be defined here
            var s = series;
            format = [];
            format.push({ x: true, number: true, required: true, computeRange: true});
            format.push({ y: true, number: true, required: true, computeRange: true });

            if (s.bars.show || (s.lines.show && s.lines.fill)) {
                var autoScale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero));
                format.push({ y: true, number: true, required: false, defaultValue: 0, computeRange: autoScale });
                if (s.bars.horizontal) {
                    delete format[format.length - 1].y;
                    format[format.length - 1].x = true;
                }
            }

            datapoints.format = format;
        }

        for (var m = 0; m < format.length; ++m) {
            if (format[m].x && xCategories) {
                format[m].number = false;
            }

            if (format[m].y && yCategories) {
                format[m].number = false;
                format[m].computeRange = false;
            }
        }
    }

    function getNextIndex(categories) {
        var index = -1;

        for (var v in categories) {
            if (categories[v] > index) {
                index = categories[v];
            }
        }

        return index + 1;
    }

    function categoriesTickGenerator(axis) {
        var res = [];
        for (var label in axis.categories) {
            var v = axis.categories[label];
            if (v >= axis.min && v <= axis.max) {
                res.push([v, label]);
            }
        }

        res.sort(function (a, b) { return a[0] - b[0]; });

        return res;
    }

    function setupCategoriesForAxis(series, axis, datapoints) {
        if (series[axis].options.mode !== "categories") {
            return;
        }

        if (!series[axis].categories) {
            // parse options
            var c = {}, o = series[axis].options.categories || {};
            if ($.isArray(o)) {
                for (var i = 0; i < o.length; ++i) {
                    c[o[i]] = i;
                }
            } else {
                for (var v in o) {
                    c[v] = o[v];
                }
            }

            series[axis].categories = c;
        }

        // fix ticks
        if (!series[axis].options.ticks) {
            series[axis].options.ticks = categoriesTickGenerator;
        }

        transformPointsOnAxis(datapoints, axis, series[axis].categories);
    }

    function transformPointsOnAxis(datapoints, axis, categories) {
        // go through the points, transforming them
        var points = datapoints.points,
            ps = datapoints.pointsize,
            format = datapoints.format,
            formatColumn = axis.charAt(0),
            index = getNextIndex(categories);

        for (var i = 0; i < points.length; i += ps) {
            if (points[i] == null) {
                continue;
            }

            for (var m = 0; m < ps; ++m) {
                var val = points[i + m];

                if (val == null || !format[m][formatColumn]) {
                    continue;
                }

                if (!(val in categories)) {
                    categories[val] = index;
                    ++index;
                }

                points[i + m] = categories[val];
            }
        }
    }

    function processDatapoints(plot, series, datapoints) {
        setupCategoriesForAxis(series, "xaxis", datapoints);
        setupCategoriesForAxis(series, "yaxis", datapoints);
    }

    function init(plot) {
        plot.hooks.processRawData.push(processRawData);
        plot.hooks.processDatapoints.push(processDatapoints);
    }

    $.plot.plugins.push({
        init: init,
        options: options,
        name: 'categories',
        version: '1.0'
    });
})(jQuery);

/* Flot plugin for rendering pie charts.

Copyright (c) 2007-2014 IOLA and Ole Laursen.
Licensed under the MIT license.

The plugin assumes that each series has a single data value, and that each
value is a positive integer or zero.  Negative numbers don't make sense for a
pie chart, and have unpredictable results.  The values do NOT need to be
passed in as percentages; the plugin will calculate the total and per-slice
percentages internally.

* Created by Brian Medendorp

* Updated with contributions from btburnett3, Anthony Aragues and Xavi Ivars

The plugin supports these options:

    series: {
        pie: {
            show: true/false
            radius: 0-1 for percentage of fullsize, or a specified pixel length, or 'auto'
            innerRadius: 0-1 for percentage of fullsize or a specified pixel length, for creating a donut effect
            startAngle: 0-2 factor of PI used for starting angle (in radians) i.e 3/2 starts at the top, 0 and 2 have the same result
            tilt: 0-1 for percentage to tilt the pie, where 1 is no tilt, and 0 is completely flat (nothing will show)
            offset: {
                top: integer value to move the pie up or down
                left: integer value to move the pie left or right, or 'auto'
            },
            stroke: {
                color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#FFF')
                width: integer pixel width of the stroke
            },
            label: {
                show: true/false, or 'auto'
                formatter:  a user-defined function that modifies the text/style of the label text
                radius: 0-1 for percentage of fullsize, or a specified pixel length
                background: {
                    color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#000')
                    opacity: 0-1
                },
                threshold: 0-1 for the percentage value at which to hide labels (if they're too small)
            },
            combine: {
                threshold: 0-1 for the percentage value at which to combine slices (if they're too small)
                color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#CCC'), if null, the plugin will automatically use the color of the first slice to be combined
                label: any text value of what the combined slice should be labeled
            }
            highlight: {
                opacity: 0-1
            }
        }
    }

More detail and specific examples can be found in the included HTML file.

*/

(function($) {
    // Maximum redraw attempts when fitting labels within the plot

    var REDRAW_ATTEMPTS = 10;

    // Factor by which to shrink the pie when fitting labels within the plot

    var REDRAW_SHRINK = 0.95;

    function init(plot) {
        var canvas = null,
            target = null,
            options = null,
            maxRadius = null,
            centerLeft = null,
            centerTop = null,
            processed = false,
            ctx = null;

        // interactive variables

        var highlights = [];

        // add hook to determine if pie plugin in enabled, and then perform necessary operations

        plot.hooks.processOptions.push(function(plot, options) {
            if (options.series.pie.show) {
                options.grid.show = false;

                // set labels.show

                if (options.series.pie.label.show === "auto") {
                    if (options.legend.show) {
                        options.series.pie.label.show = false;
                    } else {
                        options.series.pie.label.show = true;
                    }
                }

                // set radius

                if (options.series.pie.radius === "auto") {
                    if (options.series.pie.label.show) {
                        options.series.pie.radius = 3 / 4;
                    } else {
                        options.series.pie.radius = 1;
                    }
                }

                // ensure sane tilt

                if (options.series.pie.tilt > 1) {
                    options.series.pie.tilt = 1;
                } else if (options.series.pie.tilt < 0) {
                    options.series.pie.tilt = 0;
                }
            }
        });

        plot.hooks.bindEvents.push(function(plot, eventHolder) {
            var options = plot.getOptions();
            if (options.series.pie.show) {
                if (options.grid.hoverable) {
                    eventHolder.unbind("mousemove").mousemove(onMouseMove);
                    eventHolder.bind("mouseleave", onMouseMove);
                }
                if (options.grid.clickable) {
                    eventHolder.unbind("click").click(onClick);
                }
            }
        });

        plot.hooks.shutdown.push(function (plot, eventHolder) {
            eventHolder.unbind("mousemove", onMouseMove);
            eventHolder.unbind("mouseleave", onMouseMove);
            eventHolder.unbind("click", onClick);
            highlights = [];
        });

        plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
            var options = plot.getOptions();
            if (options.series.pie.show) {
                processDatapoints(plot, series, data, datapoints);
            }
        });

        plot.hooks.drawOverlay.push(function(plot, octx) {
            var options = plot.getOptions();
            if (options.series.pie.show) {
                drawOverlay(plot, octx);
            }
        });

        plot.hooks.draw.push(function(plot, newCtx) {
            var options = plot.getOptions();
            if (options.series.pie.show) {
                draw(plot, newCtx);
            }
        });

        function processDatapoints(plot, series, datapoints) {
            if (!processed) {
                processed = true;
                canvas = plot.getCanvas();
                target = $(canvas).parent();
                options = plot.getOptions();
                plot.setData(combine(plot.getData()));
            }
        }

        function combine(data) {
            var total = 0,
                combined = 0,
                numCombined = 0,
                color = options.series.pie.combine.color,
                newdata = [],
                i,
                value;

            // Fix up the raw data from Flot, ensuring the data is numeric

            for (i = 0; i < data.length; ++i) {
                value = data[i].data;

                // If the data is an array, we'll assume that it's a standard
                // Flot x-y pair, and are concerned only with the second value.

                // Note how we use the original array, rather than creating a
                // new one; this is more efficient and preserves any extra data
                // that the user may have stored in higher indexes.

                if ($.isArray(value) && value.length === 1) {
                    value = value[0];
                }

                if ($.isArray(value)) {
                    // Equivalent to $.isNumeric() but compatible with jQuery < 1.7
                    if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) {
                        value[1] = +value[1];
                    } else {
                        value[1] = 0;
                    }
                } else if (!isNaN(parseFloat(value)) && isFinite(value)) {
                    value = [1, +value];
                } else {
                    value = [1, 0];
                }

                data[i].data = [value];
            }

            // Sum up all the slices, so we can calculate percentages for each

            for (i = 0; i < data.length; ++i) {
                total += data[i].data[0][1];
            }

            // Count the number of slices with percentages below the combine
            // threshold; if it turns out to be just one, we won't combine.

            for (i = 0; i < data.length; ++i) {
                value = data[i].data[0][1];
                if (value / total <= options.series.pie.combine.threshold) {
                    combined += value;
                    numCombined++;
                    if (!color) {
                        color = data[i].color;
                    }
                }
            }

            for (i = 0; i < data.length; ++i) {
                value = data[i].data[0][1];
                if (numCombined < 2 || value / total > options.series.pie.combine.threshold) {
                    newdata.push(
                        $.extend(data[i], {     /* extend to allow keeping all other original data values
                                                   and using them e.g. in labelFormatter. */
                            data: [[1, value]],
                            color: data[i].color,
                            label: data[i].label,
                            angle: value * Math.PI * 2 / total,
                            percent: value / (total / 100)
                        })
                    );
                }
            }

            if (numCombined > 1) {
                newdata.push({
                    data: [[1, combined]],
                    color: color,
                    label: options.series.pie.combine.label,
                    angle: combined * Math.PI * 2 / total,
                    percent: combined / (total / 100)
                });
            }

            return newdata;
        }

        function draw(plot, newCtx) {
            if (!target) {
                return; // if no series were passed
            }

            var canvasWidth = plot.getPlaceholder().width(),
                canvasHeight = plot.getPlaceholder().height(),
                legendWidth = target.children().filter(".legend").children().width() || 0;

            ctx = newCtx;

            // WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!

            // When combining smaller slices into an 'other' slice, we need to
            // add a new series.  Since Flot gives plugins no way to modify the
            // list of series, the pie plugin uses a hack where the first call
            // to processDatapoints results in a call to setData with the new
            // list of series, then subsequent processDatapoints do nothing.

            // The plugin-global 'processed' flag is used to control this hack;
            // it starts out false, and is set to true after the first call to
            // processDatapoints.

            // Unfortunately this turns future setData calls into no-ops; they
            // call processDatapoints, the flag is true, and nothing happens.

            // To fix this we'll set the flag back to false here in draw, when
            // all series have been processed, so the next sequence of calls to
            // processDatapoints once again starts out with a slice-combine.
            // This is really a hack; in 0.9 we need to give plugins a proper
            // way to modify series before any processing begins.

            processed = false;

            // calculate maximum radius and center point
            maxRadius = Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
            centerTop = canvasHeight / 2 + options.series.pie.offset.top;
            centerLeft = canvasWidth / 2;

            if (options.series.pie.offset.left === "auto") {
                if (options.legend.position.match("w")) {
                    centerLeft += legendWidth / 2;
                } else {
                    centerLeft -= legendWidth / 2;
                }
                if (centerLeft < maxRadius) {
                    centerLeft = maxRadius;
                } else if (centerLeft > canvasWidth - maxRadius) {
                    centerLeft = canvasWidth - maxRadius;
                }
            } else {
                centerLeft += options.series.pie.offset.left;
            }

            var slices = plot.getData(),
                attempts = 0;

            // Keep shrinking the pie's radius until drawPie returns true,
            // indicating that all the labels fit, or we try too many times.
            do {
                if (attempts > 0) {
                    maxRadius *= REDRAW_SHRINK;
                }
                attempts += 1;
                clear();
                if (options.series.pie.tilt <= 0.8) {
                    drawShadow();
                }
            } while (!drawPie() && attempts < REDRAW_ATTEMPTS)

            if (attempts >= REDRAW_ATTEMPTS) {
                clear();
                target.prepend("<div class='error'>Could not draw pie with labels contained inside canvas</div>");
            }

            if (plot.setSeries && plot.insertLegend) {
                plot.setSeries(slices);
                plot.insertLegend();
            }

            // we're actually done at this point, just defining internal functions at this point
            function clear() {
                ctx.clearRect(0, 0, canvasWidth, canvasHeight);
                target.children().filter(".pieLabel, .pieLabelBackground").remove();
            }

            function drawShadow() {
                var shadowLeft = options.series.pie.shadow.left;
                var shadowTop = options.series.pie.shadow.top;
                var edge = 10;
                var alpha = options.series.pie.shadow.alpha;
                var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;

                if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 2 - shadowTop || radius <= edge) {
                    return;    // shadow would be outside canvas, so don't draw it
                }

                ctx.save();
                ctx.translate(shadowLeft, shadowTop);
                ctx.globalAlpha = alpha;
                ctx.fillStyle = "#000";

                // center and rotate to starting position
                ctx.translate(centerLeft, centerTop);
                ctx.scale(1, options.series.pie.tilt);

                //radius -= edge;
                for (var i = 1; i <= edge; i++) {
                    ctx.beginPath();
                    ctx.arc(0, 0, radius, 0, Math.PI * 2, false);
                    ctx.fill();
                    radius -= i;
                }

                ctx.restore();
            }

            function drawPie() {
                var startAngle = Math.PI * options.series.pie.startAngle;
                var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
                var i;
                // center and rotate to starting position

                ctx.save();
                ctx.translate(centerLeft, centerTop);
                ctx.scale(1, options.series.pie.tilt);
                //ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera

                // draw slices
                ctx.save();

                var currentAngle = startAngle;
                for (i = 0; i < slices.length; ++i) {
                    slices[i].startAngle = currentAngle;
                    drawSlice(slices[i].angle, slices[i].color, true);
                }

                ctx.restore();

                // draw slice outlines
                if (options.series.pie.stroke.width > 0) {
                    ctx.save();
                    ctx.lineWidth = options.series.pie.stroke.width;
                    currentAngle = startAngle;
                    for (i = 0; i < slices.length; ++i) {
                        drawSlice(slices[i].angle, options.series.pie.stroke.color, false);
                    }

                    ctx.restore();
                }

                // draw donut hole
                drawDonutHole(ctx);

                ctx.restore();

                // Draw the labels, returning true if they fit within the plot
                if (options.series.pie.label.show) {
                    return drawLabels();
                } else return true;

                function drawSlice(angle, color, fill) {
                    if (angle <= 0 || isNaN(angle)) {
                        return;
                    }

                    if (fill) {
                        ctx.fillStyle = color;
                    } else {
                        ctx.strokeStyle = color;
                        ctx.lineJoin = "round";
                    }

                    ctx.beginPath();
                    if (Math.abs(angle - Math.PI * 2) > 0.000000001) {
                        ctx.moveTo(0, 0); // Center of the pie
                    }

                    //ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera
                    ctx.arc(0, 0, radius, currentAngle, currentAngle + angle / 2, false);
                    ctx.arc(0, 0, radius, currentAngle + angle / 2, currentAngle + angle, false);
                    ctx.closePath();
                    //ctx.rotate(angle); // This doesn't work properly in Opera
                    currentAngle += angle;

                    if (fill) {
                        ctx.fill();
                    } else {
                        ctx.stroke();
                    }
                }

                function drawLabels() {
                    var currentAngle = startAngle;
                    var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius;

                    for (var i = 0; i < slices.length; ++i) {
                        if (slices[i].percent >= options.series.pie.label.threshold * 100) {
                            if (!drawLabel(slices[i], currentAngle, i)) {
                                return false;
                            }
                        }
                        currentAngle += slices[i].angle;
                    }

                    return true;

                    function drawLabel(slice, startAngle, index) {
                        if (slice.data[0][1] === 0) {
                            return true;
                        }

                        // format label text
                        var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter;

                        if (lf) {
                            text = lf(slice.label, slice);
                        } else {
                            text = slice.label;
                        }

                        if (plf) {
                            text = plf(text, slice);
                        }

                        var halfAngle = ((startAngle + slice.angle) + startAngle) / 2;
                        var x = centerLeft + Math.round(Math.cos(halfAngle) * radius);
                        var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt;

                        var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>";
                        target.append(html);

                        var label = target.children("#pieLabel" + index);
                        var labelTop = (y - label.height() / 2);
                        var labelLeft = (x - label.width() / 2);

                        label.css("top", labelTop);
                        label.css("left", labelLeft);

                        // check to make sure that the label is not outside the canvas
                        if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) {
                            return false;
                        }

                        if (options.series.pie.label.background.opacity !== 0) {
                            // put in the transparent background separately to avoid blended labels and label boxes
                            var c = options.series.pie.label.background.color;
                            if (c == null) {
                                c = slice.color;
                            }

                            var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;";
                            $("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>")
                                .css("opacity", options.series.pie.label.background.opacity)
                                .insertBefore(label);
                        }

                        return true;
                    } // end individual label function
                } // end drawLabels function
            } // end drawPie function
        } // end draw function

        // Placed here because it needs to be accessed from multiple locations

        function drawDonutHole(layer) {
            if (options.series.pie.innerRadius > 0) {
                // subtract the center
                layer.save();
                var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius;
                layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color
                layer.beginPath();
                layer.fillStyle = options.series.pie.stroke.color;
                layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
                layer.fill();
                layer.closePath();
                layer.restore();

                // add inner stroke
                layer.save();
                layer.beginPath();
                layer.strokeStyle = options.series.pie.stroke.color;
                layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
                layer.stroke();
                layer.closePath();
                layer.restore();

                // TODO: add extra shadow inside hole (with a mask) if the pie is tilted.
            }
        }

        //-- Additional Interactive related functions --

        function isPointInPoly(poly, pt) {
            for (var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i) {
                ((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) ||
                (poly[j][1] <= pt[1] && pt[1] < poly[i][1])) &&
                (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0]) &&
                (c = !c);
            }
            return c;
        }

        function findNearbySlice(mouseX, mouseY) {
            var slices = plot.getData(),
                options = plot.getOptions(),
                radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius,
                x, y;

            for (var i = 0; i < slices.length; ++i) {
                var s = slices[i];
                if (s.pie.show) {
                    ctx.save();
                    ctx.beginPath();
                    ctx.moveTo(0, 0); // Center of the pie
                    //ctx.scale(1, options.series.pie.tilt);    // this actually seems to break everything when here.
                    ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false);
                    ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false);
                    ctx.closePath();
                    x = mouseX - centerLeft;
                    y = mouseY - centerTop;

                    if (ctx.isPointInPath) {
                        if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) {
                            ctx.restore();
                            return {
                                datapoint: [s.percent, s.data],
                                dataIndex: 0,
                                series: s,
                                seriesIndex: i
                            };
                        }
                    } else {
                        // excanvas for IE doesn;t support isPointInPath, this is a workaround.
                        var p1X = radius * Math.cos(s.startAngle),
                            p1Y = radius * Math.sin(s.startAngle),
                            p2X = radius * Math.cos(s.startAngle + s.angle / 4),
                            p2Y = radius * Math.sin(s.startAngle + s.angle / 4),
                            p3X = radius * Math.cos(s.startAngle + s.angle / 2),
                            p3Y = radius * Math.sin(s.startAngle + s.angle / 2),
                            p4X = radius * Math.cos(s.startAngle + s.angle / 1.5),
                            p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5),
                            p5X = radius * Math.cos(s.startAngle + s.angle),
                            p5Y = radius * Math.sin(s.startAngle + s.angle),
                            arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]],
                            arrPoint = [x, y];

                        // TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt?

                        if (isPointInPoly(arrPoly, arrPoint)) {
                            ctx.restore();
                            return {
                                datapoint: [s.percent, s.data],
                                dataIndex: 0,
                                series: s,
                                seriesIndex: i
                            };
                        }
                    }

                    ctx.restore();
                }
            }

            return null;
        }

        function onMouseMove(e) {
            triggerClickHoverEvent("plothover", e);
        }

        function onClick(e) {
            triggerClickHoverEvent("plotclick", e);
        }

        // trigger click or hover event (they send the same parameters so we share their code)

        function triggerClickHoverEvent(eventname, e) {
            var offset = plot.offset();
            var canvasX = parseInt(e.pageX - offset.left);
            var canvasY = parseInt(e.pageY - offset.top);
            var item = findNearbySlice(canvasX, canvasY);

            if (options.grid.autoHighlight) {
                // clear auto-highlights
                for (var i = 0; i < highlights.length; ++i) {
                    var h = highlights[i];
                    if (h.auto === eventname && !(item && h.series === item.series)) {
                        unhighlight(h.series);
                    }
                }
            }

            // highlight the slice

            if (item) {
                highlight(item.series, eventname);
            }

            // trigger any hover bind events

            var pos = { pageX: e.pageX, pageY: e.pageY };
            target.trigger(eventname, [pos, item]);
        }

        function highlight(s, auto) {
            //if (typeof s == "number") {
            //    s = series[s];
            //}

            var i = indexOfHighlight(s);

            if (i === -1) {
                highlights.push({ series: s, auto: auto });
                plot.triggerRedrawOverlay();
            } else if (!auto) {
                highlights[i].auto = false;
            }
        }

        function unhighlight(s) {
            if (s == null) {
                highlights = [];
                plot.triggerRedrawOverlay();
            }

            //if (typeof s == "number") {
            //    s = series[s];
            //}

            var i = indexOfHighlight(s);

            if (i !== -1) {
                highlights.splice(i, 1);
                plot.triggerRedrawOverlay();
            }
        }

        function indexOfHighlight(s) {
            for (var i = 0; i < highlights.length; ++i) {
                var h = highlights[i];
                if (h.series === s) {
                    return i;
                }
            }
            return -1;
        }

        function drawOverlay(plot, octx) {
            var options = plot.getOptions();
            var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;

            octx.save();
            octx.translate(centerLeft, centerTop);
            octx.scale(1, options.series.pie.tilt);

            for (var i = 0; i < highlights.length; ++i) {
                drawHighlight(highlights[i].series);
            }

            drawDonutHole(octx);

            octx.restore();

            function drawHighlight(series) {
                if (series.angle <= 0 || isNaN(series.angle)) {
                    return;
                }

                //octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString();
                octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor
                octx.beginPath();
                if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) {
                    octx.moveTo(0, 0); // Center of the pie
                }
                octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false);
                octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false);
                octx.closePath();
                octx.fill();
            }
        }
    } // end init (plugin body)

    // define pie specific options and their default values
    var options = {
        series: {
            pie: {
                show: false,
                radius: "auto",    // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value)
                innerRadius: 0, /* for donut */
                startAngle: 3 / 2,
                tilt: 1,
                shadow: {
                    left: 5,    // shadow left offset
                    top: 15,    // shadow top offset
                    alpha: 0.02    // shadow alpha
                },
                offset: {
                    top: 0,
                    left: "auto"
                },
                stroke: {
                    color: "#fff",
                    width: 1
                },
                label: {
                    show: "auto",
                    formatter: function(label, slice) {
                        return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>";
                    },    // formatter function
                    radius: 1,    // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value)
                    background: {
                        color: null,
                        opacity: 0
                    },
                    threshold: 0    // percentage at which to hide the label (i.e. the slice is too narrow)
                },
                combine: {
                    threshold: -1,    // percentage at which to combine little slices into one larger slice
                    color: null,    // color to give the new slice (auto-generated if null)
                    label: "Other"    // label to give the new slice
                },
                highlight: {
                    //color: "#fff",        // will add this functionality once parseColor is available
                    opacity: 0.5
                }
            }
        }
    };

    $.plot.plugins.push({
        init: init,
        options: options,
        name: "pie",
        version: "1.1"
    });
})(jQuery);

/* Flot plugin for stacking data sets rather than overlaying them.

Copyright (c) 2007-2014 IOLA and Ole Laursen.
Licensed under the MIT license.

The plugin assumes the data is sorted on x (or y if stacking horizontally).
For line charts, it is assumed that if a line has an undefined gap (from a
null point), then the line above it should have the same gap - insert zeros
instead of "null" if you want another behaviour. This also holds for the start
and end of the chart. Note that stacking a mix of positive and negative values
in most instances doesn't make sense (so it looks weird).

Two or more series are stacked when their "stack" attribute is set to the same
key (which can be any number or string or just "true"). To specify the default
stack, you can set the stack option like this:

    series: {
        stack: null/false, true, or a key (number/string)
    }

You can also specify it for a single series, like this:

    $.plot( $("#placeholder"), [{
        data: [ ... ],
        stack: true
    }])

The stacking order is determined by the order of the data series in the array
(later series end up on top of the previous).

Internally, the plugin modifies the datapoints in each series, adding an
offset to the y value. For line series, extra data points are inserted through
interpolation. If there's a second y value, it's also adjusted (e.g for bar
charts or filled areas).

*/

(function ($) {
    var options = {
        series: { stack: null } // or number/string
    };

    function init(plot) {
        function findMatchingSeries(s, allseries) {
            var res = null;
            for (var i = 0; i < allseries.length; ++i) {
                if (s === allseries[i]) break;

                if (allseries[i].stack === s.stack) {
                    res = allseries[i];
                }
            }

            return res;
        }

        function addBottomPoints (s, datapoints) {
            var formattedPoints = [];
            for (var i = 0; i < datapoints.points.length; i += 2) {
                formattedPoints.push(datapoints.points[i]);
                formattedPoints.push(datapoints.points[i + 1]);
                formattedPoints.push(0);
            }

            datapoints.format.push({
                x: false,
                y: true,
                number: true,
                required: false,
                computeRange: s.yaxis.options.autoScale !== 'none',
                defaultValue: 0
            });
            datapoints.points = formattedPoints;
            datapoints.pointsize = 3;
        }

        function stackData(plot, s, datapoints) {
            if (s.stack == null || s.stack === false) return;

            var needsBottom = s.bars.show || (s.lines.show && s.lines.fill);
            var hasBottom = datapoints.pointsize > 2 && (s.bars.horizontal ? datapoints.format[2].x : datapoints.format[2].y);
            // Series data is missing bottom points - need to format
            if (needsBottom && !hasBottom) {
                addBottomPoints(s, datapoints);
            }

            var other = findMatchingSeries(s, plot.getData());
            if (!other) return;

            var ps = datapoints.pointsize,
                points = datapoints.points,
                otherps = other.datapoints.pointsize,
                otherpoints = other.datapoints.points,
                newpoints = [],
                px, py, intery, qx, qy, bottom,
                withlines = s.lines.show,
                horizontal = s.bars.horizontal,
                withsteps = withlines && s.lines.steps,
                fromgap = true,
                keyOffset = horizontal ? 1 : 0,
                accumulateOffset = horizontal ? 0 : 1,
                i = 0, j = 0, l, m;

            while (true) {
                if (i >= points.length) break;

                l = newpoints.length;

                if (points[i] == null) {
                    // copy gaps
                    for (m = 0; m < ps; ++m) {
                        newpoints.push(points[i + m]);
                    }

                    i += ps;
                } else if (j >= otherpoints.length) {
                    // for lines, we can't use the rest of the points
                    if (!withlines) {
                        for (m = 0; m < ps; ++m) {
                            newpoints.push(points[i + m]);
                        }
                    }

                    i += ps;
                } else if (otherpoints[j] == null) {
                    // oops, got a gap
                    for (m = 0; m < ps; ++m) {
                        newpoints.push(null);
                    }

                    fromgap = true;
                    j += otherps;
                } else {
                    // cases where we actually got two points
                    px = points[i + keyOffset];
                    py = points[i + accumulateOffset];
                    qx = otherpoints[j + keyOffset];
                    qy = otherpoints[j + accumulateOffset];
                    bottom = 0;

                    if (px === qx) {
                        for (m = 0; m < ps; ++m) {
                            newpoints.push(points[i + m]);
                        }

                        newpoints[l + accumulateOffset] += qy;
                        bottom = qy;

                        i += ps;
                        j += otherps;
                    } else if (px > qx) {
                        // we got past point below, might need to
                        // insert interpolated extra point
                        if (withlines && i > 0 && points[i - ps] != null) {
                            intery = py + (points[i - ps + accumulateOffset] - py) * (qx - px) / (points[i - ps + keyOffset] - px);
                            newpoints.push(qx);
                            newpoints.push(intery + qy);
                            for (m = 2; m < ps; ++m) {
                                newpoints.push(points[i + m]);
                            }

                            bottom = qy;
                        }

                        j += otherps;
                    } else { // px < qx
                        if (fromgap && withlines) {
                            // if we come from a gap, we just skip this point
                            i += ps;
                            continue;
                        }

                        for (m = 0; m < ps; ++m) {
                            newpoints.push(points[i + m]);
                        }

                        // we might be able to interpolate a point below,
                        // this can give us a better y
                        if (withlines && j > 0 && otherpoints[j - otherps] != null) {
                            bottom = qy + (otherpoints[j - otherps + accumulateOffset] - qy) * (px - qx) / (otherpoints[j - otherps + keyOffset] - qx);
                        }

                        newpoints[l + accumulateOffset] += bottom;

                        i += ps;
                    }

                    fromgap = false;

                    if (l !== newpoints.length && needsBottom) {
                        newpoints[l + 2] += bottom;
                    }
                }

                // maintain the line steps invariant
                if (withsteps && l !== newpoints.length && l > 0 &&
                    newpoints[l] !== null &&
                    newpoints[l] !== newpoints[l - ps] &&
                    newpoints[l + 1] !== newpoints[l - ps + 1]) {
                    for (m = 0; m < ps; ++m) {
                        newpoints[l + ps + m] = newpoints[l + m];
                    }

                    newpoints[l + 1] = newpoints[l - ps + 1];
                }
            }

            datapoints.points = newpoints;
        }

        plot.hooks.processDatapoints.push(stackData);
    }

    $.plot.plugins.push({
        init: init,
        options: options,
        name: 'stack',
        version: '1.2'
    });
})(jQuery);

/* Flot plugin for showing crosshairs when the mouse hovers over the plot.

Copyright (c) 2007-2014 IOLA and Ole Laursen.
Licensed under the MIT license.

The plugin supports these options:

    crosshair: {
        mode: null or "x" or "y" or "xy"
        color: color
        lineWidth: number
    }

Set the mode to one of "x", "y" or "xy". The "x" mode enables a vertical
crosshair that lets you trace the values on the x axis, "y" enables a
horizontal crosshair and "xy" enables them both. "color" is the color of the
crosshair (default is "rgba(170, 0, 0, 0.80)"), "lineWidth" is the width of
the drawn lines (default is 1).

The plugin also adds four public methods:

  - setCrosshair( pos )

    Set the position of the crosshair. Note that this is cleared if the user
    moves the mouse. "pos" is in coordinates of the plot and should be on the
    form { x: xpos, y: ypos } (you can use x2/x3/... if you're using multiple
    axes), which is coincidentally the same format as what you get from a
    "plothover" event. If "pos" is null, the crosshair is cleared.

  - clearCrosshair()

    Clear the crosshair.

  - lockCrosshair(pos)

    Cause the crosshair to lock to the current location, no longer updating if
    the user moves the mouse. Optionally supply a position (passed on to
    setCrosshair()) to move it to.

    Example usage:

    var myFlot = $.plot( $("#graph"), ..., { crosshair: { mode: "x" } } };
    $("#graph").bind( "plothover", function ( evt, position, item ) {
        if ( item ) {
            // Lock the crosshair to the data point being hovered
            myFlot.lockCrosshair({
                x: item.datapoint[ 0 ],
                y: item.datapoint[ 1 ]
            });
        } else {
            // Return normal crosshair operation
            myFlot.unlockCrosshair();
        }
    });

  - unlockCrosshair()

    Free the crosshair to move again after locking it.
*/

(function ($) {
    var options = {
        crosshair: {
            mode: null, // one of null, "x", "y" or "xy",
            color: "rgba(170, 0, 0, 0.80)",
            lineWidth: 1
        }
    };

    function init(plot) {
        // position of crosshair in pixels
        var crosshair = {x: -1, y: -1, locked: false, highlighted: false};

        plot.setCrosshair = function setCrosshair(pos) {
            if (!pos) {
                crosshair.x = -1;
            } else {
                var o = plot.p2c(pos);
                crosshair.x = Math.max(0, Math.min(o.left, plot.width()));
                crosshair.y = Math.max(0, Math.min(o.top, plot.height()));
            }

            plot.triggerRedrawOverlay();
        };

        plot.clearCrosshair = plot.setCrosshair; // passes null for pos

        plot.lockCrosshair = function lockCrosshair(pos) {
            if (pos) {
                plot.setCrosshair(pos);
            }

            crosshair.locked = true;
        };

        plot.unlockCrosshair = function unlockCrosshair() {
            crosshair.locked = false;
            crosshair.rect = null;
        };

        function onMouseOut(e) {
            if (crosshair.locked) {
                return;
            }

            if (crosshair.x !== -1) {
                crosshair.x = -1;
                plot.triggerRedrawOverlay();
            }
        }

        function onMouseMove(e) {
            var offset = plot.offset();
            if (crosshair.locked) {
                var mouseX = Math.max(0, Math.min(e.pageX - offset.left, plot.width()));
                var mouseY = Math.max(0, Math.min(e.pageY - offset.top, plot.height()));

                if ((mouseX > crosshair.x - 4) && (mouseX < crosshair.x + 4) && (mouseY > crosshair.y - 4) && (mouseY < crosshair.y + 4)) {
                    if (!crosshair.highlighted) {
                        crosshair.highlighted = true;
                        plot.triggerRedrawOverlay();
                    }
                } else {
                    if (crosshair.highlighted) {
                        crosshair.highlighted = false;
                        plot.triggerRedrawOverlay();
                    }
                }
                return;
            }

            if (plot.getSelection && plot.getSelection()) {
                crosshair.x = -1; // hide the crosshair while selecting
                return;
            }

            crosshair.x = Math.max(0, Math.min(e.pageX - offset.left, plot.width()));
            crosshair.y = Math.max(0, Math.min(e.pageY - offset.top, plot.height()));
            plot.triggerRedrawOverlay();
        }

        plot.hooks.bindEvents.push(function (plot, eventHolder) {
            if (!plot.getOptions().crosshair.mode) {
                return;
            }

            eventHolder.mouseout(onMouseOut);
            eventHolder.mousemove(onMouseMove);
        });

        plot.hooks.drawOverlay.push(function (plot, ctx) {
            var c = plot.getOptions().crosshair;
            if (!c.mode) {
                return;
            }

            var plotOffset = plot.getPlotOffset();

            ctx.save();
            ctx.translate(plotOffset.left, plotOffset.top);

            if (crosshair.x !== -1) {
                var adj = plot.getOptions().crosshair.lineWidth % 2 ? 0.5 : 0;

                ctx.strokeStyle = c.color;
                ctx.lineWidth = c.lineWidth;
                ctx.lineJoin = "round";

                ctx.beginPath();
                if (c.mode.indexOf("x") !== -1) {
                    var drawX = Math.floor(crosshair.x) + adj;
                    ctx.moveTo(drawX, 0);
                    ctx.lineTo(drawX, plot.height());
                }
                if (c.mode.indexOf("y") !== -1) {
                    var drawY = Math.floor(crosshair.y) + adj;
                    ctx.moveTo(0, drawY);
                    ctx.lineTo(plot.width(), drawY);
                }
                if (crosshair.locked) {
                    if (crosshair.highlighted) ctx.fillStyle = 'orange';
                    else ctx.fillStyle = c.color;
                    ctx.fillRect(Math.floor(crosshair.x) + adj - 4, Math.floor(crosshair.y) + adj - 4, 8, 8);
                }
                ctx.stroke();
            }
            ctx.restore();
        });

        plot.hooks.shutdown.push(function (plot, eventHolder) {
            eventHolder.unbind("mouseout", onMouseOut);
            eventHolder.unbind("mousemove", onMouseMove);
        });
    }

    $.plot.plugins.push({
        init: init,
        options: options,
        name: 'crosshair',
        version: '1.0'
    });
})(jQuery);

/*
Axis label plugin for flot

Derived from:
Axis Labels Plugin for flot.
http://github.com/markrcote/flot-axislabels

Original code is Copyright (c) 2010 Xuan Luo.
Original code was released under the GPLv3 license by Xuan Luo, September 2010.
Original code was rereleased under the MIT license by Xuan Luo, April 2012.

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

(function($) {
    "use strict";

    var options = {
        axisLabels: {
            show: true
        }
    };

    function AxisLabel(axisName, position, padding, placeholder, axisLabel, surface) {
        this.axisName = axisName;
        this.position = position;
        this.padding = padding;
        this.placeholder = placeholder;
        this.axisLabel = axisLabel;
        this.surface = surface;
        this.width = 0;
        this.height = 0;
        this.elem = null;
    }

    AxisLabel.prototype.calculateSize = function() {
        var axisId = this.axisName + 'Label',
            layerId = axisId + 'Layer',
            className = axisId + ' axisLabels';

        var info = this.surface.getTextInfo(layerId, this.axisLabel, className);
        this.labelWidth = info.width;
        this.labelHeight = info.height;

        if (this.position === 'left' || this.position === 'right') {
            this.width = this.labelHeight + this.padding;
            this.height = 0;
        } else {
            this.width = 0;
            this.height = this.labelHeight + this.padding;
        }
    };

    AxisLabel.prototype.transforms = function(degrees, x, y, svgLayer) {
        var transforms = [], translate, rotate;
        if (x !== 0 || y !== 0) {
            translate = svgLayer.createSVGTransform();
            translate.setTranslate(x, y);
            transforms.push(translate);
        }
        if (degrees !== 0) {
            rotate = svgLayer.createSVGTransform();
            var centerX = Math.round(this.labelWidth / 2),
                centerY = 0;
            rotate.setRotate(degrees, centerX, centerY);
            transforms.push(rotate);
        }

        return transforms;
    };

    AxisLabel.prototype.calculateOffsets = function(box) {
        var offsets = {
            x: 0,
            y: 0,
            degrees: 0
        };
        if (this.position === 'bottom') {
            offsets.x = box.left + box.width / 2 - this.labelWidth / 2;
            offsets.y = box.top + box.height - this.labelHeight;
        } else if (this.position === 'top') {
            offsets.x = box.left + box.width / 2 - this.labelWidth / 2;
            offsets.y = box.top;
        } else if (this.position === 'left') {
            offsets.degrees = -90;
            offsets.x = box.left - this.labelWidth / 2;
            offsets.y = box.height / 2 + box.top;
        } else if (this.position === 'right') {
            offsets.degrees = 90;
            offsets.x = box.left + box.width - this.labelWidth / 2;
            offsets.y = box.height / 2 + box.top;
        }
        offsets.x = Math.round(offsets.x);
        offsets.y = Math.round(offsets.y);

        return offsets;
    };

    AxisLabel.prototype.cleanup = function() {
        var axisId = this.axisName + 'Label',
            layerId = axisId + 'Layer',
            className = axisId + ' axisLabels';
        this.surface.removeText(layerId, 0, 0, this.axisLabel, className);
    };

    AxisLabel.prototype.draw = function(box) {
        var axisId = this.axisName + 'Label',
            layerId = axisId + 'Layer',
            className = axisId + ' axisLabels',
            offsets = this.calculateOffsets(box),
            style = {
                position: 'absolute',
                bottom: '',
                right: '',
                display: 'inline-block',
                'white-space': 'nowrap'
            };

        var layer = this.surface.getSVGLayer(layerId);
        var transforms = this.transforms(offsets.degrees, offsets.x, offsets.y, layer.parentNode);

        this.surface.addText(layerId, 0, 0, this.axisLabel, className, undefined, undefined, undefined, undefined, transforms);
        this.surface.render();
        Object.keys(style).forEach(function(key) {
            layer.style[key] = style[key];
        });
    };

    function init(plot) {
        plot.hooks.processOptions.push(function(plot, options) {
            if (!options.axisLabels.show) {
                return;
            }

            var axisLabels = {};
            var defaultPadding = 2; // padding between axis and tick labels

            plot.hooks.axisReserveSpace.push(function(plot, axis) {
                var opts = axis.options;
                var axisName = axis.direction + axis.n;

                axis.labelHeight += axis.boxPosition.centerY;
                axis.labelWidth += axis.boxPosition.centerX;

                if (!opts || !opts.axisLabel || !axis.show) {
                    return;
                }

                var padding = opts.axisLabelPadding === undefined
                    ? defaultPadding
                    : opts.axisLabelPadding;

                var axisLabel = axisLabels[axisName];
                if (!axisLabel) {
                    axisLabel = new AxisLabel(axisName,
                        opts.position, padding,
                        plot.getPlaceholder()[0], opts.axisLabel, plot.getSurface());
                    axisLabels[axisName] = axisLabel;
                }

                axisLabel.calculateSize();

                // Incrementing the sizes of the tick labels.
                axis.labelHeight += axisLabel.height;
                axis.labelWidth += axisLabel.width;
            });

            // TODO - use the drawAxis hook
            plot.hooks.draw.push(function(plot, ctx) {
                $.each(plot.getAxes(), function(flotAxisName, axis) {
                    var opts = axis.options;
                    if (!opts || !opts.axisLabel || !axis.show) {
                        return;
                    }

                    var axisName = axis.direction + axis.n;
                    axisLabels[axisName].draw(axis.box);
                });
            });

            plot.hooks.shutdown.push(function(plot, eventHolder) {
                for (var axisName in axisLabels) {
                    axisLabels[axisName].cleanup();
                }
            });
        });
    };

    $.plot.plugins.push({
        init: init,
        options: options,
        name: 'axisLabels',
        version: '3.0'
    });
})(jQuery);
